Method, Information Terminal, and Storage Medium

2. The method according to claim 1, wherein the reducing of the allergy ingredient includes removing the allergy ingredient such that the amount of the ingredient is zero.

4. The method according to claim 1, wherein the identification information includes a user ID.

5. The method according to claim 1, wherein the first server is different from the second server.

6. The method according to claim 1, wherein the restaurant ID is acquired by reading, via the first operation screen, an identification code prepared at a location corresponding to a seat at a table where the user is seated.

7. The method according to claim 6, wherein the identification code includes a QR code.

8. The method according to claim 1, wherein the first server distributedly manages at least one of biological information including the allergy information, item purchase history information, preference information including dish order history information of the user, or the behavior history information including the location information of the user.

9. An information terminal that executes the method according to claim 1.

10. A non-transitory computer-readable storage medium storing a program for causing a computer of the information terminal to execute the method according to claim 1.

11. The non-transitory computer-readable storage medium according to claim 10, wherein the identification information identifying the user includes a serial code assigned to the program for each information terminal.